Gents & Patrick:
I think I've assembled the ingredients, but I'd like to form a
rudimentary understanding of the differences between Patrick's formula
(below) and the one I dug out of Anchell which follows. I must admit that I
got the hydrochloride from the Photographer's Formulary before I read the
fine print.
Can anyone weigh in on this?

Gainer Rodinal:
700 ml water. Add 150 grams sodium sulfite and 14 grams of sodium
hydroxide. Red Devil lye will do. When the solids are dissolved, bring the
volume up to 1 liter with water, put the solution in a 1 liter storage
container and add 40 grams of p-aminophenol (not the hydrochloride), shake
well and serve. Use it as Rodinal.
There will be some precipitate. This is the "few remaining crystals" of
the standard recipe and is the protection against aerial oxidation. Of
course, you don't believe me, but try it anyway.
ie
700 ml water
150g sodium sulfite
14g sodium hydroxide
40g p-aminophenol

Here's the Anchell version
750ml water
100g p-aminophenol hydrochloride
300g potassium metabisulfite
200g sodium hydroxide (actual amount determined while mixing)

-Lew